baber/WOPTO huggingface dataset:
Patent GB-317023-A (GB)
Title: Improvements in and relating to detonators and the like
IPC: C06B41/08
Filed: 1928-03-08
Abstract: 317,023. Ashcroft, G. A., and Imperial Chemical Industries, Ltd. March 8 1928. Explosives.-Lead trinitroresorcinate, alone or mixed with lead azide and intended for use in detonators, is mixed with a small quantity of the order of 3 per cent of the priming charge of a non-deleterious lubricating solid such as aluminium powder or graphite. The addition of aluminium powder or graphite to lead azide makes its colour different from that of tetryl and thus renders its presence over a charge of tetryl in a detonator easily seen.
Patent GB-1032912-A (GB)
Title: Triggered blocking oscillator circuit
IPC: H03K3/30
Filed: 1963-02-22
Abstract: 1,032,912. Transistor triggered blocking oscillator circuits. STANDARD TELEPHONES & CABLES Ltd. Feb. 22, 1963 [Feb. 23, 1962], No. 7270/63. Heading H3T. In a transistor triggered blocking oscillator rapid saturation of the transistor is effected by coupling the emitter of the transistor to its base by a positive feedback circuit which includes at least part of a self-inductance. At time to, Fig. 2, no input pulse is applied to input terminals bnl, bn2 and transistor tr is blocked by the potential developed across voltage divider rel, re2. A starting pulse ip1 applied to the input terminals at time tl causes the transistor to conduct and emitter current l1 flows through resistor re2 to tapping P on self-inductance coil sf where it splits into currents i4 and i2 the latter base current resulting in an increase in emitter current and hence rapid saturation of the transistor. When the transistor becomes saturated and its three electrodes are equipotential the output across terminals bn3, bn4 is as shown at ip2. Due to the constant voltage U from battery bt applied across the self-inductance sf a current i4 flows in the direction shown opposite to the base current i2, which magnetizing current increases linearly from zero at time tl until the base current 12 falls to zero and the transistor comes out of saturation and is rapidly blocked. Although the self-inductance is shown as being centre-tapped the point P may be variable, Fig. 5 (not shown). In order to protect the self-inductance against negative voltage overshoot which occurs when the transistor is blocked diode dil and resistor re4 are connected as shown.
Patent GB-1428456-A (GB)
Title: Methods and apparatus for evaluating data in the form of line- colded grouped information bits and to coding arrangements for representing data for evaluation by such methods and apparatus
IPC: G06K7/10
Filed: 1973-02-14
Abstract: 1428456 Optical data reader NIXDORF COMPUTER AG 14 Feb 1973 [22 Feb 1972] 7276/73 Heading G4M Data is optically read from a label, e.g. by a hand held light pencil scanner 10, and identified independently of scanning speed. The data, e.g. price of goods, comprises parallel black lines on a white background (or other contrasting colours), the lines being of three different thicknesses, arranged in groups of three (or four). The data groups are preceded by a three start groups and followed by three end groups both of which include an error check group representing the sum of all label numbers and a data length group. The label can be scanned in either direction, if the label is read from end to start the data is merely reversed before processing. Electrical signals representing scanned data are passed through Schmidt trigger shaper and amplifier 11 to shift register 12 connected to frequency generator 13. A control unit 14 is connected to variable frequency divider 15, the division ratio being increased stepwise at the start of a scan since a hand held scanner tends to have increasing scan speed during this period. A counter 16 counts the pulses during the scan of each line. As the width of the first line is known the count in respect of this line represents scanner speed. The count is normally passed through two position switch 17 to store 18 and thence to mean value circuit 21. In the other switch position the mean value goes to store 18. The store contents pass to line width identification circuit 19 which comprises a modulo-n-downward counter which also receives the same input as divider 15 over line 19<SP>1</SP> and is preset, for each line, to a count representative of the preceding line scanning speed. Any overflow counts after the counter has counted to zero pass to shift register 20 which then holds a coded representation of the read line. Further circuitry recognizes start, stop, and length signals and actuates a warning in case of errors. Circuit 19 feeds a signal representing line thickness to unit 44 which divides the count in counter 16 by two if the line was wide, has no effect if the line was medium, and changes over switch 17 if the line was thin.
Patent GB-397219-A (GB)
Title: A new or improved packing material for use in making pipe and other joints and method of making same
IPC: F16J15/10
Filed: 1932-03-12
Abstract: 397,219. Joint-making packing. GRATZE, E. V. HAYES-, 41, Fitz George Avenue, Kensington, London. March 12, 1932, Nos. 7387 and 13669. [Class 122 (iii).] A caulking, lagging, and packing material is prepared from unspun fibres, preferably vegetable fibres such as sisal, hemp or coir which are first softened by treatment with a neutralized sulphonated oil electrically ionized as described in Specification 363,651, [Group IX], and then carded or formed into a loose blanket-like mass. After addition of any suitable binding material, the material is brought into a form suitable for its intended purpose. The material, may be enveloped in a textile or braided covering and metal wool or wire may be incorporated in the treated mass.
Patent GB-1519877-A (GB)
Title: Process for the crosslinking or chain-extention of polymers
IPC: C08K5/205
Filed: 1976-02-25
Abstract: 1519877 Cross-linking or chain-extending hydrocarbon polymers IMPERIAL CHEMICAL INDUSTRIES Ltd 28 Jan 1977 [25 Feb 1976] 7419/76 Headings C3E and C3P [Also in Division C2] Hydrocarbon polymers containing ethylene unsaturation, e.g. natural rubber or SBR, are cross-linked or chain extended by heating in admixture with a carbamate of formula in which R1 is an optionally substituted hydrocarbyl radical, m is an integer, and A is H, an optionally substituted hydrocarbyl radical of valency m, or, when m = 2, can be a direct link, optionally in conjunction with an accelerator, e.g. triethylamine, tetramethyl thiourea or zinc diethyl dithiocarbamate.
Patent GB-1215173-A (GB)
Title: Selective temperature lamination of dissimilar composite panel
Inventor: MILLER PHILLIP A
IPC: B32B17/10
Filed: 1968-02-15
Abstract: 1,215,173. Laminating dissimilar materials. ENGLISH ELECTRIC CO. Ltd. 15 Feb., 1968 [20 Feb., 1967], No. 7506/68. Heading B5N. A method of making a transparent laminated panel comprising an interlayer of synthetic plastics material sandwiched between two outer, harder layers comprises (i) forming two separate sub-laminates, each comprising a first layer of the same or substantially similar plastics material bonded to a further layer (different in each case) and (ii) bonding said sub-laminates together by means of said first layers, at a temperature below those used to form the sublaminates, so that a single interlayer is formed. Preferably the outer layers comprise glass and polymethyl methacrylate and the interlayer comprises polyvinyl butyral, formed from two plasticized layers of different composition. Alternatively, an outer sheet may comprise polyester resin. The sub-laminates are preferably cooled before bonding. Bonding may be by pressing at elevated temperature, e.g. 38‹ C., or may be achieved by applying solvent or adhesive to the surfaces, followed by light pressure or application of vacuum at room temperature. The surfaces of the sub-laminates which are to be bonded may be textured to facilitate air removal.
Patent GB-145829-A (GB)
Title: Improvements in or relating to shell fuzes
IPC: F42C15/26
Filed: 1919-03-26
Abstract: 145,829. Vickers, Ltd., and Johnson, F. G. L. March 26, 1919. Projectile fuses.- Consists in a percussion fuse wherein a striker B with firing-pin b, which is released on discharge and is displaced axially in a forward direction by differential air pressure unopposed by spring pressure during flight, lies along the axis of the projectile in line with the detonator and is normally kept out of contact with the detonator by a safety device, such as centrifugal bolts C, C, which. when the striker moves forward. are released and allow the striker to be forced inwards on impact. The outward release of the centrifugal bolts is delayed by interengaging shoulders and recesses C' until the acceleration due to the discharge of the projectile from the gun is over. The striker is normally locked by a collar F in engagement with shoulders bx, b<0> on the striker and a shoulder e on a screwed sleeve E. On discharge. the collar sets back and its rebound is prevented by projecting points or a lip f<1>, which is deflected into a recess e<1> beneath the sleeve E. Air then gains access to the back of the striker past the edge f of the collar, which has been jagged by the shoulder bx on set-back. The striker is moved forwards by the air pressure behind it, until another shoulder b‹ on it is stopped by the edge f of the collar. The centrifugal bolts are now free to move out, and, after this, the striker is free to be forced in against the detonator when impact with the target occurs. The joints between the sleeve E, the collar F, and the striker B may be sealed with wax.
Patent GB-906275-A (GB)
Title: Improvements in or relating to a graphical recording device adapted for recording atleast one variable in terms of another variable
IPC: G01D9/40
Filed: 1959-03-05
Abstract: 906,275. Photo-electric control of recording devices. SEFRAM & THULIN A.S. March 5, 1959 [March 10, 1958], No. 7657/59. Class 40 (3). A first variable is graphically recorded in terms of a second variable by arranging for each variable (which may be electrical, mechanical or other variables) to effect a corresponding variation in respective mirrors 16, 16 1  (Fig. 1), and so vary the light from sources 17, 17 1  which falls on differential type photoresistive cells 14, 14 1 , the outputs from which are developed on conductors 11, or 12 (11 1  or 12 1 ), with respect to conductor 13 (13 1 ) depending on the half of the cells illuminated and are employed after amplification in 10 (10 1 ) to control electrical motors 7 (7 1 ) which produce a corresponding movement of a board 1 carrying the cell 14 and a recording sheet and of a cable 19 carrying the cell 14 1  and a recording stylus 18. A further indication of each variable may be produced by means of scales 24, 24 1 . Fig. 4 shows a modification in which the board 1 is fixed and the cell 14 carried by a carriage 34 which effects one component of movement of the stylus 18, the other component of which is produced by movement of cable 19 carrying the stylus 18 and the cell 14 1 . In a further modification for recording in polar coordinates motor 7 (Fig. 5) controlled by cell 14 produces a rotatory movement of the recordcarrying board 1 1  which also carries cell 14, the stylus 18, as before, being carried by cable 19 which also carries cell 14 1 . The circuit arrangement associated with the cells 14 (14 1 ) and which includes resistance capacity filters to damp natural oscillations, is described in connection with Fig. 2 (not shown), and a suitable arrangement for the amplifiers 10 (10 1 ) including thermionic valves and/or transistors and also a relay operated warning device to indicate abnormal operation is described in connection with Fig. 3 (not shown). Several sets of the elements 14 1 , 16 1 , 17 1 , 18 and 19 may be employed when it is desired to record several variables in terms of the variable controlled by cell 14.
Patent GB-589132-A (GB)
Title: Improvements in building boards or the like and method of making the same
IPC: E04C2/24
Filed: 1944-04-25
Abstract: A building board comprises a porous water-proof core made from a filler, an alkali silicate and a bituminous substance and faced with liners.  The core may be made by heating to 300 DEG F. a mixture of 60.5 per cent. limestone, 33.3 per cent. sodium silicate and 6.2 per cent. petroleum asphalt.  The liners may be felt, chipboard, kraft paper or asbestos and may be impregnated with a bituminous substance. Specification 551,701 is referred to.
Patent GB-253237-A (GB)
Title: Improvements in the construction of walls of houses and the like structures
IPC: E04B2/84
Filed: 1925-03-23
Abstract: 253,237. Kendrick, A. L. March 23, 1925. Slabs.-Flanged expanded-metal or like sheets A are coated with cement or plaster before erection, the flanges being left free for securing them by staples to the framing of a building.
Patent GB-492295-A (GB)
Title: Improvements in or relating to boiler cleaners or soot blowers
IPC: F28G3/16
Filed: 1937-03-17
Abstract: 492,295. Soot - blowers. BABCOCK & WILCOX, Ltd., and GLINN, R. J. March 17, 1937, No. 7886. [Class 99 (ii)] In a boiler soot-blower of'the kind comprising a blower tube 1 with an end nozzle 2 which is advanced into and retracted from its operative position and simultaneously rotated by suitable mechanism 25, the supply of cleaning fluid to the blower tube is controlled by a valve 5. The valve 5 is normally held on its seating 6 by a spring-pressed piston 8 which is located in a chamber 9 and is provided with an aperture 10 through which cleaning fluid from the supply pipe 4 may leak, the latter assisting the spring 7 in maintaining the valve closed against the pressure of the cleaning fluid in the supply pipe, and the valve being opened when the leakage fluid pressure is released. This release is effected by a pilot valve 13 which is located in a housing 12 to which an outlet conduit 11 from the chamber 9 leads and which is provided with an exhaust-vent 16, the valve 13 being opened by a cam 17 on the blower tube when the latter is in or near its operative position. The piston 8 may be formed integral with the valve 5, and the cam 17 may be so shaped that it maintains the valve 13 open only while the nozzle is turning through a predetermined angle and is directed towards a particular part of the boiler.
Patent GB-1032435-A (GB)
Title: Improvements in or relating to steering gears for track-laying vehicles
IPC: B62D11/10
Filed: 1963-02-27
Abstract: 1,032,435. Differential gear. ZAHNRADFABRIK FRIEDRICHSHAFEN A.G. Feb. 27, 1963 [March 9, 1962], No. 11312/65. Heading F2D. [Also in Division B7] In a steering gear for endless-track vehicles comprising a differential gear the output shafts of which drive the two tracks of the vehicle, the speed ratio of the output shafts is controlled by continuously variable change-speed mechanism. As shown, the differential comprises an input sunwheel 87 driven by an input shaft 94 through bevel gears 92, 93, a sunwheel connected to one output shaft 82, and dual planet wheels 84, 86 on a carrier 81 driving the other output shaft 80. Clutches 100, 103 controlled by a lever 116 couple either the output shaft 82 or the planet carrier 81 driving the other output shaft 80 to a clutch bell 98 connected to the sunwheel 97 of a continuously variable epicyclic ratchet gear comprising planetary wheels 96 driven through jamming rollers 122 by hubs 121 which are mounted in a carrier 91 connected to the input sun-wheel 87 and are variably oscillated by cranks 125 engaging a groove 127 of variable eccentricity controlled by a lever 133. In Fig. 2 (not shown) a differential gear similar to that shown is controlled by a variable hydrostatic transmission. To one output shaft 204 and to the planet carrier 202 driving the other output shaft 203 are secured the cylinders 221, 223 of interconnected swash-plate pumps the swash-plates 220, 224 of which are individually adjustable to vary the relative speed of the output shafts or to prevent rotation of either shaft.
Patent GB-590238-A (GB)
Title: Improvements in or relating to couplings for mine cars, railway wagons and the like
IPC: B61G1/36
Filed: 1945-03-29
Abstract: 590,238. Spring catches; hooks. ENGLISH STEEL CORPORATION, Ltd., and WHITEHOUSE, G. D. March 29, 1945, No. 7962. Drawings to Specification. [Classes 44 and 89 (ii)] [Also in Group XXXII] Relates to the spring catch described in Specification 590,237 and consists in the combination of the catch with a coupling for a mine car or other vehicle comprising a swivel link.
Patent GB-822028-A (GB)
Title: Pneumatic tyre inflation valve stem connectors
Inventor: PAYNE GUY SYVRET
IPC: B60S5/04
Filed: 1956-03-14
Abstract: 822,028. Junction pieces. H.M.L. (ENGINEERING) Ltd. March 14, 1957 [March 14, 1956], No. 8036/56. Class 99(1). A pneumatic tyre inflation valve stem connector 1, for a stem containing a needle valve, has means for depressing at will the valve needle when the connector is on the stem. By rotating the sleeve 16 on the connector, the connector is fixed on the stem by the sleeve thread 19 screwing on the stem thread until the stem seals with washer 18. The needle valve is then opened or closed by turning the knob 15 and screw 8 until the rod 24 provided with guide ribs 7 actuates the needle. The source of compressed air is connected at 2. In another embodiment the rod is push actuated against a spring.
Patent GB-235332-A (GB)
Title: Improvements in detectors for wireless telephony
IPC: H01L21/00
Filed: 1924-03-31
Abstract: 235,332. Clutterbuck, A. G. J. F., and Soden, F. A. March 31, 1924. Crystal detectors have a number of contact wires with their ends secured between perforated and plain discs A, C on a slidable and rotatable rod B. The crystal cup K is pressed towards the contact member by a spring I.
Patent GB-103760-A (GB)
Title: Improvements relating to Cylinder Covers for Internal Combustion Engines.
Inventor: SMITH PHILIP HOPKINS
IPC: F02F1/24
Filed: 1916-06-08
Abstract: 103,760. Smith, P. H. June 8, 1916. Cylinders. cooling.-The cylinder cover comprises a hollow casing 1 through which air circulates, and an inner portion 6 which carries the fuel-valve sockets 2 and the seating 9 of the scavenging-air valves, which are arranged around the fuel valve. Water circulates through the part 6 and is diverted by baffles 11.
Patent GB-544578-A (GB)
Title: An improved compound internal combustion engine
IPC: F02B41/06
Filed: 1940-05-06
Abstract: 544,578. Compound engines ; valve gear. WILLIAMS, L. L. W. May 6, 1940, No. 8146. [A Specification was laid open to inspection under Sect. 91 of the Acts, Dec. 23, 1940.] [Classes 7 (ii) and 7 (vi)] In a compound engine a four stroke cycle occurs in the high pressure cylinder and in the low pressure cylinder the expansion and exhauststrokes are followed by two idle strokes. A reciprocating cylinder 13 which is connected by a bifurcated rod to the crank shaft slides over a fixed head 14 and carries a low pressure piston 55 the upper face of which is acted upon by the expanding gases whereas the lower face compresses air into a reservoir 101 which delivers into the combustion space 29 through the passage 40 and a valve 31. A fuel inlet passage 41 in the valve 31 is controlled by a needle valve 42 the stem 43 of which and the tubular stem 33 of the air admission valve are actuated by an arm 154 mounted on a shaft 153 oscillated by linkage and cams, not shown. Fuel is supplied through a pipe connection 54. The charges in the high pressure cylinder traverse mixing passages 28 in the end of the head 14 and act on the underside of the valve head 76. At the end of the upstroke the valve is opened to discharge the expanding gases through passages 79 to the upper face of the low pressure piston 55. The valve is opened by cam mechanism 142, 108, Fig. 2a, and is retained in its open position by a friction strip 85 until the end of the outstroke when the valve is partly closed by making contact with the end 26 of the fixed head 14. It remains in this position until finally closed by the compression in the combustion space. Burnt gases exhaust from the low pressure cylinder through the valve 115. In a multi-cylinder engine the air reservoir 101 is dispensed with.
Patent GB-1493634-A (GB)
Title: Monitoring circuitry for a skid control system
IPC: B60T8/88
Filed: 1975-04-18
Abstract: 1493634 Antiskid brakes EATON CORP 18 April 1975 [10 May 1974] 08156/77 Divided out of 1493633 Heading F2F An antiskid braking system having means in the form of sensors WS-1, WS-2 each including a wheel driven rotor 10 and a stator comprising at least one sensor coil 12 providing a signal having a frequency dependent on wheel speed, and logic circuitry for determining therefrom an incipient skid condition and providing a skid signal to control the braking system and release the brakes also has means for monitoring the electrical continuity of a sensor coil including means for applying a D.C. test current to the coil to flow therethrough and establish a direct test voltage thereacross and means responsive to a variation in magnitude of said voltage for providing an output signal, representative of a loss of electrical continuity, which causes disabling of the brake control. A resistor 20 connected in series with the coil 12 has a resistance substantially greater than that of the coil so that the test voltage developed due to a D.C. current applied through resistors 20, 22 is relatively small and if either sensor circuit becomes open-circuited the output voltage from an associated amplifier 26 swings high and is coupled through a diode 50 to a monitor circuit MC which is also connected to the skid logic circuit circuit SL the valve driver circuit VD and the valve solenoid VS. The circuit MC employs timing circuits which can disable the system in the case of an excessive skid signal and energize an indicator circuit I. Similarly malfunction of the valve solenoid circuit causes the system to be disabled and the indicator energized. The system may be disabled by blowing a fuse F.
Patent GB-609559-A (GB)
Title: High frequency coupling device
IPC: H01P5/10
Filed: 1946-03-15
Abstract: 609,559. Transformers. STANDARD TELEPHONES & CABLES, Ltd. March 15, 1946, No. 8188. Convention date, April 17, 1945. [Class 38 (ii)] [Also in Group XL (c)] A high-frequency transformer for coupling a balanced and an unbalanced circuit comprises a wire loop 1, connected, for example, to anodes 2, 3 of two push-pull connected power output tubes, and inductively coupled to a second wire loop 4 which is earthed at one end 13 by connection to an earthed metal plate 5 and is surrounded by two cylindrical shields 6, 7, each connected at one end to plate 5, and connected at points 21, 22 by a variable condenser 20. The positions of points 21, 22 and the valve of the condenser are adjusted to give maximum power output from the transformer. Insulating spacers 8, 11, 15 are respectively provided to separate the ends of screens 6, 7 and to space the conductor 4 from the screens 6, 7 and the plate 5. The output end 16 of conductor 4 may be surrounded by an earthed coaxial screen 17.